Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-13 23:51:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

drivers: base: dma-mapping: use nth_page helper

Browse Source 
Use nth_page() helper instead of page_to_pfn() and pfn_to_page() to
simplify the code.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Geliang Tang 2017-03-24 22:10:49 +08:00 committed by Greg Kroah-Hartman
parent a2b60670ac
commit 0dd8911961
1 changed files with 2 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/base/dma-mapping.c
View File

@ -309,14 +309,13 @@ void *dma_common_contiguous_remap(struct page *page, size_t size,
int i;
struct page **pages;
void *ptr;
unsigned long pfn;
pages = kmalloc(sizeof(struct page *) << get_order(size), GFP_KERNEL);
if (!pages)
return NULL;
for (i = 0, pfn = page_to_pfn(page); i < (size >> PAGE_SHIFT); i++)
pages[i] = pfn_to_page(pfn + i);
for (i = 0; i < (size >> PAGE_SHIFT); i++)
pages[i] = nth_page(page, i);
ptr = dma_common_pages_remap(pages, size, vm_flags, prot, caller);